61985837 has 2 divisors, whose sum is σ = 61985838. Its totient is φ = 61985836.

The previous prime is 61985831. The next prime is 61985857. The reversal of 61985837 is 73858916.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38763076 + 23222761 = 6226^2 + 4819^2 .

It is a cyclic number.

It is not a de Polignac number, because 61985837 - 2¹⁸ = 61723693 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61985791 and 61985800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61985831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30992918 + 30992919.

It is an arithmetic number, because the mean of its divisors is an integer number (30992919).

Almost surely, 2^61985837 is an apocalyptic number.

It is an amenable number.

61985837 is a deficient number, since it is larger than the sum of its proper divisors (1).

61985837 is an equidigital number, since it uses as much as digits as its factorization.

61985837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 61985837 is about 7873.1084712456. The cubic root of 61985837 is about 395.7590212434.

The spelling of 61985837 in words is "sixty-one million, nine hundred eighty-five thousand, eight hundred thirty-seven".